Is it 4-3N-3 or 4-3W-3? If 4-3W-3 just play 4-4-2 and you should be fine passing through the middle, defensive mentality - with 3 strikers he is playing a very attacking formation, half pitch pressing, mixed length passing, zonal marking, and normal or hard tackling. Also have counter on. If 4-3N-3 use 4-1-4-1 (4-1DMC-4-1ST) and same orders apart from change passing to down the flanks.